1 files changed, 1 insertions, 2 deletions
diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs
index 2ce63d011f4..f77f9bc454b 100644
--- a/compiler/rustc_parse/src/parser/item.rs
+++ b/compiler/rustc_parse/src/parser/item.rs
@@ -1107,8 +1107,7 @@ impl<'a> Parser<'a> {
                 e
             })?;
 
-        let enum_definition =
-            EnumDef { variants: variants.into_iter().filter_map(|v| v).collect() };
+        let enum_definition = EnumDef { variants: variants.into_iter().flatten().collect() };
         Ok((id, ItemKind::Enum(enum_definition, generics)))
     }